可以使用lvmo修改每个卷组的pbuf(即固定内存缓冲区)，可以显示和控制用来缓存卷组数据的内存。
Lvmo allows you to change the pbuf, or pinned memory buffers, used for each volume group, and therefore shows and allows control over the memory used to cache volume group data.
当创建表空间时，可以将它与特定的缓冲区池(数据库缓存)关联起来，并关联到特定的容器。
When you create a table space, you can associate it with a specific buffer pool (database cache) as well as to specific containers.
大多数文件系统都通过缓冲区缓存来相互通信，这种缓存通过缓存最近使用的数据来优化对物理设备的访问。
Most of the file systems communicate through a buffer cache, which is a cache that optimizes access to the physical devices by caching recently touched data.
需要缓存数据库或其他后端数据存储区中的数据，并需要以其他方式无法达到的速度访问这些数据？
Need to cache data from a database or other backend data store that needs to be accessed at speeds that would otherwise be unattainable?
将磁盘的数据复制到缓冲区缓存，然后再复制文件数据时会出现多余的副本。
This copy occurs when the disk is copied to the buffer cache and then again from the file.
这可以在文件数据被复制到内部缓存区时立即释放用于保留该数据的NFS缓存页面。
This frees up NFS cache pages used to hold file data as soon as they have been copied to internal buffers.
通过使用这些被其称为缓存区的数据，苹果公司可以比使用全球定位卫星更快地算出手机的位置。
Apple said it used the data, which it called a cache, to calculate a device's location more quickly than through GPS satellites.
缓冲区缓存——为存储从物理数据文件读取的数据块而分配的内存。
Buffer Cache - Memory allocated for storing data blocks read from physical data files.
该缓冲区缓存原本需要从磁盘读取的JMS消息数据。
This buffer caches JMS message data that may otherwise need to be read from disk.
数据的丢失可能造成数据库负荷过多，因为缓存不再充当数据子集的缓冲区。
The loss of this data might cause the database to become overloaded, as the cache is no longer acting as a buffer for that subset of the data.
DB 2和Oracle数据库都提供了允许将数据表数据缓存在RAM中的缓冲区。
Both DB2 and Oracle databases provide buffers that allow table data to be cached in and served from RAM.
在读取方面使用中间内核缓冲区，可以允许内核缓冲区在应用程序不需要内核缓冲区内的全部数据时，充当 “预读高速缓存（readahead cache）” 的角色。
Using the intermediate buffer on the read side allows the kernel buffer to act as a "readahead cache" when the application hasn't asked for as much data as the kernel buffer holds.
mytop还提供了一个有关关键字缓冲区和查询缓存效率的实时数据和历史数据，以及有关正在运行的查询的统计信息。
mytop also provides real-time and historical data about key-buffer and query-cache efficiency, and statistics about the queries being run.
注意，可以使用sync命令将缓冲区缓存中的请求发送到存储媒体(迫使所有未写的数据发送到设备驱动程序，进而发送到存储设备)。
Note that you can use the sync command to flush the buffer cache out to the storage media (force all unwritten data out to the device drivers and, subsequently, to the storage device).
缓冲区缓存为存储从物理数据文件读取的数据块而分配的内存。
Buffer Cache Memory allocated for storing data blocks read from physical data files.
如果数据一段时间未被使用，将最终从高速缓存区释放，将由新的数据代替。
Data that has not been used for a while is eventually released from the cache to make room for new data.
结果，CPU将缓存区的旧数据进行移位操作。
As a result, the CPU instead shifts the old contents of the cache.
结果，CPU将缓存区的旧数据进行移位操作。
As a result, the CPU instead shifts the old contents of the cache.
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